cc: Remove wtf hashmap from damage tracker

cc/damage_tracker.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CCDamageTracker_h
 #define CCDamageTracker_h
 
+#include "base/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
 #include "FloatRect.h"
 #include <vector>
-#include <wtf/HashMap.h>
-#include <wtf/Vector.h>
 
 namespace WebKit {
 class WebFilterOperations;
 }
 
 namespace cc {
 
 class CCLayerImpl;
 class CCRenderSurface;
 
@@ skipping 20 matching lines @@
     FloatRect removeRectFromCurrentFrame(int layerID, bool& layerIsNew);
     void saveRectForNextFrame(int layerID, const FloatRect& targetSpaceRect);
 
     // These helper functions are used only in trackDamageFromActiveLayers().
     void extendDamageForLayer(CCLayerImpl*, FloatRect& targetDamageRect);
     void extendDamageForRenderSurface(CCLayerImpl*, FloatRect& targetDamageRect);
 
     // To correctly track exposed regions, two hashtables of rects are maintained.
     // The "current" map is used to compute exposed regions of the current frame, while
     // the "next" map is used to collect layer rects that are used in the next frame.
-    typedef HashMap<int, FloatRect> RectMap;
+    typedef base::hash_map<int, FloatRect> RectMap;
     scoped_ptr<RectMap> m_currentRectHistory;
     scoped_ptr<RectMap> m_nextRectHistory;
 
     FloatRect m_currentDamageRect;
     bool m_forceFullDamageNextUpdate;
 };
 
 } // namespace cc
 
 #endif // CCDamageTracker_h